Instrument-casing.



W. E. BRISTOL.

INSTRUMENT GASING.

APPLIOATIGN FILED NOV. 22, 1913.

1,099,1 15, Patented June 2, 1914.

v@ g Mika/7073123121] COLUMBIA PLANMRAIH Cc.. WASHINGTON, D. c.

uUNITED STATES PATENT OFFICE.

WILLIAM BRISTOL, OF WATERBURY, CONNECTICUT, ASSIGNOR T0 THE BRISTOLCCMPANY, OF WATERBURY, CONNECTICUT, A CORPORATION 0F CONNECTICUT.

INSTRUMENT-CASING.

insana.

To all whom it may concern:

le it known that l, WILLiAM H. Brrsfron, a citizen of the United States,and a resident of Waterbury, in the county of New Haven and State ofConnecticut, have invented certain new and useful improvements inlnstrument-CaSings, of Which the following is a speciiication.

The invention relates to improvements in casings for measuringinstruments or gages, and more particularly to the cover er lid which isadapted to seal the interior thereof against the entrance of dust,moisture or other foreign material.

lt has for its object to provide, of sheet metal of suitable thickness,a lid or cover for a casing; and which lid, though comparatively light,shall be su'liiciently durable and reinforced to sustain the glass plateas well as to ailord ample material for attachment of a hinge. A savingof material is effected in the improved construction and a lighterweight cover produced, whereby stress on the hinge is reduced to aminimum.

A further object of the invention is to afford means to retain suitablepacking to render the casing dust and moistureproof- The nature of theinvention will be best understood when described in connection with theaccompanying drawings, in vvhich v Figure 1 is a front elevation of apressure gage provided with the improved casing cover. Fig. 2 is ahorizontal section there-- through, the gage mechanism being omitted.

Similar characters of reference designate corresponding parts throughoutthe several views.

Referring to the drawings, 10 designates a casing of suitable materialand is shown cylindrical in form, said casing being adapted to retainthe measuring apparatus 11 as is well understood. Apparatus thus mountedin a casing is usually of a sensitive nature and requires protectionfrom dust, moisture and` other foreign materials; and for this purpose,there is generally hingedly conn^cted to the casing a cover or lid suchas the cover 12 herein shown, and which retains a glass front or plate13. Heretofore, these covers were constructed of suitable castings whichnecessarily rendered them heavy and which, moreover, requiredconsiderable ma` chine Work thereon to provide the necessary holdingrmembers and the desired nish.,

Specification of Letters Patent.

Application filed November 22, 1913.

Patented J une 2, 1914.

Serial No. 802,382.

It is the object of the present invention to provide a cover which maybe rapidly and cheaply formed out of sheet metal; and for this purpose,the same is constructed of two parts-an outer ring 14 and an inner ring15. -The outer ring 14 is shaped to suit, having preferably an upperoverhanging or outwardly flaring rim 16 of the doubled over portion ofthe material and an outer wall 17 extending inwardly toward and adaptedto tit over the edge of the casing 10. The inner wall 18 of said ringextends over the plate 13 with which it contacts, being turned slightlytoward the casing. The inner ring 15 is channel shaped and is fittedWithin the outer ring, being secured thereto by soldering at a number ofpoints. The outer wall 19 of the ring 15 extends inwardly toward theeasing 10 following the wall 17 for a portion of its length and is thenturned away from the same to provide a groove 20 adapted toretainsuitable packing 21 resting, when the cover is closed, upon the edge ofthe casing to securely seal said casing against the entrance of dust,moisture and other foreign material. The other wall orlip 22 of saidinner ring aords an abutment for the glass plate 13 which is held in thecover by a suitable cement 23 and by iiexible clips 2li which latter maybe attached to the bottom of the channel shaped ring 15 and extend underthe glass to hold the same. The walls 17 and 19 at their contactingportions provide, moreover, sufficient material for the attachment forone leaf of a hinge 25, the other leaf of which is attached to thecasing 10.

I claim 1. The combination with a cylindricalcasing; of a cover thereforcomprising an outer channel shaped ring and an inner channel shaped ringof sheet metal iitting therein and suitably secured thereto, the outersides thereof being separated at their edges to provide a packing grooveto retain suitable packing adapted to cooperate with the edge of saidcasing; and a plate held by said rings.

2. The combination with a cylindrical casing; of a cover thereforcomprising an outer channel shaped ring and an inner channel shaped ringof sheet metal, fitting therein and suitably secured thereto and theouter sides thereof being separated at their edges to provide a packinggroove to retain suitable packing adapted to cooperate with the edge ofsaid easing; a plate held by said rings; and a hinge, one leaf of `whichis*V secured to the walls of both the said rings and the other to saidCasing, whereby the.

outer ring and olfset therefrom at its edge said cover is hingedlyconnected thereto.

3. The combination with a cylindrical easl ing; of a cover thereforcomprising an outer ring and an inner ring of sheet metal, the; formerbeing doubled upon itself for a portion and flaring outwardly to providea suitable rim for `the cover and one wall thereof extending over theeasing and the other toward the easing and adapted to ii-t over ythesame, and the said inner ring `haying a wall extending toward saidcasing following` the similar wall of said outer `ring and offsettherefrom at the edge thereof to afford a packing groove vcooperatingwith the edge of said easing; and a plate held by said rings.

4. The Combination with ya cylindrical casing; of cover `,thereforComprising an .outer ring and an inner 4ring .of sheet metal, the formerbeing doubled upon itself for a portion and flaring outwardly to provide-a suitable rim for the cover and having .one wall thereof extendingover the easing and the other ltoward the `easing and adapted .to

it over the same, and the said inner ring haring a wall extending towardsaid :easing following the similar wall of said outer ring and offsettherefrom at the edge thereof to afford a packing groove vCooperatingwith the edge of said casing; a plate held by said rings; and a hinge,one leaf of which is secured to the two inwardly extending walls of theouter and inner rings and the other leaf to the said Casing to hingedlyoonneCt ,the @over thereto.

5. The combination with a Cylindrical easing; of a Cover therefor.comprising an vouter ring and an inner ring of sheet metal, the formerhaving one wall thereof extendingf over the casing and the other towardthe easing and adapted to fit over the same, and the said inner Yringbeing channel shaped, one wal'l thereof extending toward said easing andfollowing the similar wall of said to afford a packing groovecooperating with the edge of said Casing, and the other wall .of said,ehannel shaped ring extending a short distance toward said easing toprovide an abutment; and a plate .held between the wall of the outerring extending over said .eas-ing .and rthe said abutment.

i6. rlhe combination with a cylindrical casing; yof aeoyer ,thereforComprising an outer ring and an linner ring of Sheet metal, the formerbeing doubled upon itself for ,a portion and flaring outwardly toprovide a -suitable rim for the eover and one wall thereof .extendingoyer .the .easing and the other toward the easing and .adapted to fitover the same, and 2the said inner ring being -ehannel shaped, one wallthereof extending toward said easing and following :the similar wall ofsaid outer ring and `offset therefrom at its ,edge to afford a packinggroove Aeooperating with 'the zedge of said easing, and the ether wallof said .channel shaped ring extending a short distance toward saideasing to provide an abutment; a plate vheld between the wall of theouter ring ,extending over said casing andthe said abutment; and a.hinge, one leaf ,of which is secured to the two eQpe,rating inwardlyextending walls of the .outer and inner rings .and the other leaf to the`said ,easing to hingedly conneet the cover thereto.

Signed lat New York, i-n the County of lN ew York, and State of NewYork, .this 18th day of November, A. D. 1913.

WILLAM H. BRISTOL. Witnesses:

FBnDK F.. SoHUnrz, LAURA SMITH.

Copies of this patent may `be obtained for ve cents veasrh, br v 1.1'f=,sinz the, Gqmmisstoaer erraten, Washington, D. Q3

